Home / 15,279.77-21,085.89-8,565.39

Finding the Fourth Proportional to 15,279.77, 21,085.89 and 8,565.39

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Solution

The fourth proportional to 15,279.77, 21,085.89 and 8,565.39 is: 11,820.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,279.77 : 21,085.89 = 8,565.39 : x
  2. Step 2: Convert to fraction form
    15,279.77/21,085.89 = 8,565.39/x
  3. Step 3: Cross multiply
    15,279.77x = 21,085.89 × 8,565.39
  4. Step 4: Simplify right side
    15,279.77x = 180,608,871.35
  5. Step 5: Solve for x
    x = 180,608,871.35/15,279.77
  6. Step 6: Final answer
    x = 11,820.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.